There's also some low-hanging fruit if someone wants to contribute. E.g. the developer docs are rather outdated. I recently implemented AMD FSR as a Gimp plugin but all the docs led to code that resulted in a slew of deprecation warnings. Also poor performance and some thing just not working right at all (tile cache). I kinda got frustrated with it and dropped the gimp parts altogether, but if I had more time, it shouldn't be hard to figure out and maybe improve the docs or write an up to date tutorial.